Risk Factors for Intestinal and Extraintestinal Cancers in Inflammatory Bowel Disease: A Retrospective Single-Center...

Area of Science:

• Gastroenterology
• Oncology
• Epidemiology

Background:

• Patients with inflammatory bowel disease (IBD) have an elevated risk of intestinal and extraintestinal cancers.
• Quantifying cancer risk and identifying associated risk factors in IBD patients is crucial for proactive management.

Purpose of the Study:

• To retrospectively assess cancer incidence and identify risk factors in a cohort of IBD patients.
• To compare cancer risk in IBD patients to the general population using standardized incidence ratios (SIRs).

Main Methods:

• Retrospective analysis of epidemiological data, disease characteristics, and cancer occurrences in 560 IBD patients.
• Calculation of hazard ratios (HRs) and standardized incidence ratios (SIRs) to estimate cancer risk.
• Data collection spanned from January 2021 to February 2022.

Main Results:

• IBD patients exhibited a twofold increased risk of any cancer (SIR 1.94).
• Colorectal (29%), skin (19%), and breast cancer (17%) were most common. Females had higher risks for overall cancer, melanoma, and CRC; males had a higher risk for lymphoma.
• Younger age at IBD diagnosis and use of immunomodulators (alone or with biologics) were linked to increased cancer risk.

Conclusions:

• The risk of colorectal cancer and lymphoma in IBD patients may exceed previous estimates, possibly due to combination therapy use.
• Regular, personalized cancer risk assessment is essential throughout the IBD disease course.